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Left to right: cutaway view of traditional seatpost, cutaway view of Madone seatmast, photo of Madone seatmast.
Instead of a conventional seatpost, Trek's Madone boasts a seatmast (image). Compared to traditional seatposts (image, left) and also modern integrated seatmasts, this engineering masterpiece boosts strength and pedaling efficiency, saves weight, increases compliance a whopping 39% (for maximum comfort), and offers all the adjustability you'll ever need (no cutting required). It lets your Trek fit in a UPS-compatible box for shipping, too!